Investigations on surface wettability of ZnO nanowires using UV LEDs for biosensing applications

Bhavsar, Kaushalkumar; Prabhu, Radhakrishna; Pollard, Pat

doi:10.1088/1757-899x/64/1/012033

Cited by 7 publications

(8 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The data show that the two treatment methods can be combined for optimal enhancement of the Raman signal intensity by the introduction of additional energy levels due to heat treatment and UV light preirradiation and excitation of charge from said levels by UV light. The UV light may, however, remove some of the previously introduced interstitial oxygen and cause the ZnO-NWs surface to become more hydrophilic, reversing the positive effects previously introduced by heat treatment . Therefore, the PIERS signal intensity of a heat-treated sample following relaxation is expected to be lower than that of the initial SERS signal, as shown in the inset of Figure b.…”

Section: Resultsmentioning

confidence: 99%

Oxygen Incorporation-Induced SERS Enhancement in Silver Nanoparticle-Decorated ZnO Nanowires

Fularz

Almohammed

Rice

2020

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

Surface-enhanced Raman spectroscopy (SERS) is a sensitive and nondestructive technique used for the detection of molecules, traditionally applied on noble-metal or semiconductor substrates. Point defect introduction has been applied to increase the enhancement of semiconductor templates due to more efficient charge transfer; however, they are still limited by low detection sensitivity and inferior SERS enhancement. Here we propose a universal approach of oxygen incorporation into metal oxide nanowire/metal nanoparticle templates that allows for greater SERS enhancement due to localized surface plasmon resonance excitation, point defect-induced optical gap shrinking, and wettability change of the substrate. We report up to 5-fold Raman relative peak intensity enhancement after annealing-induced oxygen introduction. This approach is applied to defect formation in metal oxide semiconductor nanowires such as ZnO, WO 3 , TiO 2 , and NiO and is applicable for a wide variety of probe molecules, making the method suitable for medical, security, and environmental applications.

show abstract

Section: Resultsmentioning

confidence: 99%

Oxygen Incorporation-Induced SERS Enhancement in Silver Nanoparticle-Decorated ZnO Nanowires

Fularz

Almohammed

Rice

2020

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

show abstract

“…Au-coated cover glasses were probably spaced by a thin solution layer from the cells, which explains the survival of the underneath cells. In contrast, ZnO NRAs (with or without Au-coating) could exclude such a thin solution layer from underneath by allowing the solution to fill the spaces between the nanorods as a result of the capillary effect [28,29] and lead to a more intimate contact to the cell monolayer. In such a case, the diffusions of nutrients and oxygen should be very limited, and the cells underneath would die.…”

Section: Discussion and Outlookmentioning

confidence: 99%

Zinc oxide nanorod array as an inhibitory biointerface

et al. 2018

View full text Add to dashboard Cite

show abstract

“…The herein complex effects of the ZnO based biointerfaces were tentatively explained by Wang et al [ 123 ] by considering that ZnO 1D materials at high density inhibit cellular adhesion, resulting in the loss of viability for fast dividing cell lines [ 130 ], whereas the lack of adhesion could still be tolerated by primary cells [ 132 ]. Moreover, ZnO 1D materials can also remove a thin solution layer below the cells, simply because the cell culture media tends to fill the spaces between the NRs due to capillary effects [ 133 , 134 ] thus limiting the diffusion of nutrient and oxygen to the cell, and resulting in cell death.…”

Section: Zinc Oxide-based 1d Materialsmentioning

confidence: 99%

On the Interaction between 1D Materials and Living Cells

Arrabito

Aleeva

Ferrara

et al. 2020

JFB

View full text Add to dashboard Cite

One-dimensional (1D) materials allow for cutting-edge applications in biology, such as single-cell bioelectronics investigations, stimulation of the cellular membrane or the cytosol, cellular capture, tissue regeneration, antibacterial action, traction force investigation, and cellular lysis among others. The extraordinary development of this research field in the last ten years has been promoted by the possibility to engineer new classes of biointerfaces that integrate 1D materials as tools to trigger reconfigurable stimuli/probes at the sub-cellular resolution, mimicking the in vivo protein fibres organization of the extracellular matrix. After a brief overview of the theoretical models relevant for a quantitative description of the 1D material/cell interface, this work offers an unprecedented review of 1D nano- and microscale materials (inorganic, organic, biomolecular) explored so far in this vibrant research field, highlighting their emerging biological applications. The correlation between each 1D material chemistry and the resulting biological response is investigated, allowing to emphasize the advantages and the issues that each class presents. Finally, current challenges and future perspectives are discussed.

show abstract

Investigations on surface wettability of ZnO nanowires using UV LEDs for biosensing applications

Cited by 7 publications

References 15 publications

Oxygen Incorporation-Induced SERS Enhancement in Silver Nanoparticle-Decorated ZnO Nanowires

Oxygen Incorporation-Induced SERS Enhancement in Silver Nanoparticle-Decorated ZnO Nanowires

Zinc oxide nanorod array as an inhibitory biointerface

On the Interaction between 1D Materials and Living Cells

Contact Info

Product

Resources

About